3643216 has 20 divisors (see below), whose sum is σ = 7126900. Its totient is φ = 1804032.

The previous prime is 3643201. The next prime is 3643217. The reversal of 3643216 is 6123463.

It can be written as a sum of positive squares in 2 ways, for example, as 2903616 + 739600 = 1704^2 + 860^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700 + ... + 2788.

It is an arithmetic number, because the mean of its divisors is an integer number (356345).

Almost surely, 2^3643216 is an apocalyptic number.

It is an amenable number.

3643216 is a deficient number, since it is larger than the sum of its proper divisors (3483684).

3643216 is a wasteful number, since it uses less digits than its factorization.

3643216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206 (or 2200 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

The square root of 3643216 is about 1908.7210377632. The cubic root of 3643216 is about 153.8727233086.

Adding to 3643216 its reverse (6123463), we get a palindrome (9766679).

The spelling of 3643216 in words is "three million, six hundred forty-three thousand, two hundred sixteen".